Traduction en anglais : Drinking Water supply while considering toxic geogenic Arsenic concentrations.
Geogenic Arsenic in Drinking Water.
Drinking water production of surface spring water in southern Lower Saxony (Niedersachsen, Germany) was reduced because of microbiological contaminations and unreliably variable water reserves.
Surface spring water in general has a low arsenic content.
As a consequence ground water has been increasingly used for drinking water.
Thus, high geogenic concentrations of arsenic in the central, Buntsandstein in southern Lower Saxony caused high arsenic contents in the groundwater.
Under the regulation of the German Drinking Water Ordinance (1986) the limit for total arsenic (40 mug/l) was exceeded in 2% of 150 fountains, wells and sources in southern Lower Saxony.
Because of the well-known cancerogenic potential of arsenic the limit for total arsenic in drinking water was reduced from 40 mug/l to 10 mug/l suspending the new standard value until January 1996.
This regulation based on new calculations revealing a skin cancer risk of roughly 6 : 10,000 and a mortality risk of roughly 1 : 106 in respect of lifetime in case of arsenic concentrations of 10 mug As/l drinking water.
After that limit change 40% of 150 wells and sources in southern Lower Saxony exceeded the arsenic limit of 10 mug/l drinking water.
As a matter of fact, it became necessary for a large number of water supply works to eliminate arsenic from the drinking water by technical means or to dilute drinking water with high concentrations of arsenic.
Mots-clés Pascal : Arsenic, Pollution eau, Eau alimentation, Toxicité, Epidémiologie, Facteur risque, Homme, Allemagne, Europe, Santé et environnement
Mots-clés Pascal anglais : Arsenic, Water pollution, Feed water, Toxicity, Epidemiology, Risk factor, Human, Germany, Europe, Health and environment
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0498652
Code Inist : 002B30B02A. Création : 19/02/1999.